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x.24=3027+2589
x.24=5616
x =5616:24
x =234
Hình như câu 2 sai đề
a) x+678=2813
=>x=2813-678
=>x=2145
x x 23=3082
=>x= 3082:23
=>x=134
a. ( x + 268 ) x 137 = 48498
( x + 268 ) = 48498 / 137
x + 268 = 354
x = 354 - 268
x = 86
a) \(124+\left(118+x\right)=217\)
\(118+x=217-124\)
\(118+x=93\)
\(x=-25\)
vay \(x=-25\)
b) \(\left[\left(6x-72\right):2-84\right].28=5628\)
\(\left(6x-72\right):2-84=5628:28\)
\(\left(6x-72\right):2-84=201\)
\(\left(6x-72\right):2=201+84\)
\(\left(6x-72\right):2=285\)
\(6x-72=285.2\)
\(6x-72=570\)
\(6x=642\)
\(x=107\)
vay \(x-107\)
c) \(71.2-\left(2x+5\right).6=100\)
\(142-\left(2x+5\right).6=100\)
\(\left(2x+5\right).6=142-100\)
\(\left(2x+5\right).6=42\)
\(2x+5=7\)
\(2x=2\)
\(x=1\)
vay \(x=1\)
x : 84 = 124 42 x \(x\)= 1890
x = 124 x 84 x = 1890 : 42
x = 10.416 x = 45
x : 84 = 124
=> x = 124 x 84 = 10416
42 . x = 1890
=> x = 1890 : 42 = 45
3145-246+2347-145+4246-347
=(3145-145)+(2347-347)+(4246-246)
=3000+2000+4000=9000
minh chi lam dk câu ý thui
C1) 1357 x 2048 + 357 x 2048 = 2779136 + 731136 = 3510272
C2) 1357 x 2048 + 357 x 2048 = 2048 x (1357 + 357) = 3510272
C3) 1357 x 2048 + 357 x 2048
= 1357 x 2048 + (1357 - 1000) x 2048
= 1357 x 2048 + 1357 x 2048 -1000 x 2048
= 2048 x (1357 + 1357 - 1000)
= 2048 x 1714
= 3510272
:) 1357 x 2048 + 357 x 2048
= 1357 x 2048 + (1357 - 1000) x 2048
= 1357 x 2048 + 1357 x 2048 -1000 x 2048
= 2048 x (1357 + 1357 - 1000)
= 2048 x 1714
= 3510272
\(\left(x+268\right).137=48498\)
\(\Leftrightarrow x+268=48498:137\)
\(\Leftrightarrow x+268=354\)
\(\Leftrightarrow x=354-268\)
\(\Leftrightarrow x=86\)
b) \(\left(x+3217\right):215=348\)
\(\Leftrightarrow x+3217=348.215\)
\(\Leftrightarrow x+3217=74820\)
\(\Leftrightarrow x=74820-3217\)
\(\Leftrightarrow x=71603\)
c) \(\left(x-2048\right):145=246\)
\(\Leftrightarrow x-2048=246.145\)
\(\Leftrightarrow x-2048=35670\)
\(\Leftrightarrow x=35670+2048\)
\(\Leftrightarrow x=37718\)
d) \(\left(2043-x\right).84=132552\)
\(\Leftrightarrow2043-x=132552:84\)
\(\Leftrightarrow2043-x=1578\)
\(\Leftrightarrow x=2043-1578\)
\(\Leftrightarrow x=465\)
e) \(x.124+5276=48304\)
\(\Leftrightarrow x.124=48304-5275\)
\(\Leftrightarrow x.124=43028\)
\(\Leftrightarrow x=43028:124\)
\(\Leftrightarrow x=347\)
\(\Leftrightarrow2043-x=1578\)
a) ( x + 268 ) x 137 = 48498
( x + 268 ) = 48498
x + 268 = 354
x = 354 - 268
x = 86